He asked _____ for the computer.
| A．did I pay how much |
| B．I paid how much |
| C．how much did I pay |
| D．how much I paid |
The research is so designed that once _____ nothing can be done to change it.
| A．begins | B．having begun | C．beginning | D．begun |
If _____ carefully, the experiment will be successful.
| A．do | B．does | C．done | D．doing |
----- When was the People’s Liberation Army’s Navy founded?
-----It ____the April of 1949.
| A．dates to | B．dated back | C．dated from | D．dates back to |
A naval parade can provide a platform, _____ navies on behalf of different nations can communicate.
| A．in which | B．through which | C．where | D．that |
It has been that some government leaders _____ their authority and position to get illegal profits for themselves that resulted in the opposition in Thailand..
| A．abuse | B．take | C．employ | D．overlook |